Since NBC last polled, Dems have lost favorability:

Biden from 54-22% to 34-38%
Sanders from 44-30% to 37-40%
Warren from 30-28% to 31-32%

Don’t confuse primary polls with general #s & don’t underestimate Rep ability to make any Dem nominee into Hillaryhttps://t.co/nOneD7mo2C

— Matt Grossmann (@MattGrossmann) August 18, 2019